1.	Simplify 1 Simplify the following expression: $$ \left(-2 + 6 - \left(1 + 1\right)\right)2\left(-4 - 4\right) $$ Correct Answer $$ -32$$ or -32.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{2\times3(-5)}{\left(1 + -6\right)\frac{2}{3}} $$ Correct Answer $$ 9$$ or 9.00000

3.	Fractions 1 Simplify the following expression: $$ \frac{1}{6} + \frac{-5}{2} $$ Correct Answer $$ \frac{-7}{3}$$ or -2.3333333333333335

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{3}{5}}{\frac{-2}{4}} $$ Correct Answer $$ \frac{-6}{5}$$ or -1.2

5.	Significant figures 1. Write the following to 3 significant figures: 0.000039715831 Correct Answer 0.0000397 or $$3.97\times10^{-5}$$ 2. Write the following to 4 significant figures: 46.384609 Correct Answer 46.38 or $$4.638\times10^{1}$$

6.	Standard Form 1. Write the following in standard form to 5 significant digits: 0.0000469476 Correct Answer $$4.6948\times10^{-5}$$ 2. Write the following in standard form to 2 significant digits: 0.000433081 Correct Answer $$4.3\times10^{-4}$$

7.	Significant figures 1. Write the following in preferred standard form to 3 significant digits: 16.518 Correct Answer $$16.5\times10^{0}$$ 2. Write the following in preferred standard form to 2 significant digits: 0.00914 Correct Answer $$9.1\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ {\left(2\left(-2 - 4\right)\right)}^{\left(-3 - 1 - \left(5 + 5\right)\right)} $$ Correct Answer $$ {12}^{-14}$$ or 0.000000000000000778866

9.	Simplify 1 Simplify the following expression: $$ 2(-4)(-5)\left(1 + 3 - -2\times6\right) $$ Correct Answer $$ 640$$ or 640.000

10.	Simplify 2 Simplify the following expression: $$ \frac{{\left(-6 + -3\right)}^{2}}{\frac{4}{6}\left(-2 - 1\right)} $$ Correct Answer $$ \frac{-81}{2}$$ or -40.5000